OKLAHOMA CITY – There are chilling new details involving a FBI investigation in Oklahoma City.

The case involves allegations of murder for hire.

NBC News in Washington, D.C. talked with law enforcement sources who say the suspect, Preston Rhoads, claimed to have the deadly poison ricin.

Bob Moore Chopper Four Pilot John Welsh was over the northwest Oklahoma City neighborhood as federal agents raided Rhoads’ home just after 3 p.m Thursday.

Rhoads is a suspect in a federal investigation after authorities say he tried to hire someone to carry out a murder.

“Information was gathered a few days ago that lead us to believe that a gentleman was trying to commit a homicide, and that’s what’s lead us here today,” said Dexter Nelson of the Oklahoma City Police Department.

Oklahoma City Police and the FBI swarmed 30-year-old Preston Harrison Rhoads’ home, sealed from head to toe in gas masks and hazmat suits.

Officials tell NBC’s Pete Williams in Washington, D.C. that Rhoads made claims to have ricin.

Authorities confirmed to NBC News they entered Rhoads’ home and took samples of the substance which is currently being tested.